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Hippocampal formations of normal rat brain (scanned mid-coronal section)

Cross-section of both hippocampal formations (Hi) showing the dentate gyrus (DG), and the CA3, CA2, and CA1 regions. Hematoxylin and eosin staining. (Source: Pulido 2008. Creative Commons Attribution license. http://creativecommons.org/licenses/by/3.0.)